code: def generate_algebra_simplify_sample(
      vlist, ops, min_depth, max_depth
  ):
      """Randomly generate an algebra simplify dataset sample.
  
      Given an input expression, produce the simplified expression.
  
      Args:
        vlist: Variable list. List of chars that can be used in the expression.
        ops: List of ExprOp instances. The allowed operators for the expression.
        min_depth: Expression trees will not have a smaller depth than this. 0 means
            there is just a variable. 1 means there is one operation.
        max_depth: Expression trees will not have a larger depth than this. To make
            all trees have the same depth, set this equal to `min_depth`.
  
      Returns:
        sample: String representation of the input.
        target: String representation of the solution.
      """
      depth = random.randrange(min_depth, max_depth + 1)
      expr = random_expr(depth, vlist, ops)
  
      sample = str(expr)
      target = format_sympy_expr(sympy.simplify(sample))
      return sample, target
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from collections import namedtuple
  import random
  import six
  from six.moves import range
  import sympy
label_desc: Use image node_id 7 for calling a global function with example usage: generate_algebra_simplify_sample(vlist, ops, min_depth, max_depth) and returns: sample,  target